Anisotropic Magnetoresistance and Nontrivial Spin Hall Magnetoresistance in Pt/$\alpha$-Fe${}_2$O${}_3$ Bilayers

Abstract

To date, magnetic proximity effect (MPE) has only been conclusively observed in ferromagnet (FM) based systems. We report the observation of anomalous Hall effect and anisotropic magnetoresistance in angular dependent magnetoresistance (ADMR) measurements in Pt on antiferromagnetic (AF) $\alpha$-Fe${}_2$O${}_3$(0001) epitaxial films at 10 K, which provide evidence for the MPE. The Néel order of $\alpha$-Fe${}_2$O${}_3$ and the induced magnetization in Pt show a unique ADMR compared with all other FM and AF systems. A macrospin response model is established and can explain the AF spin configuration and all main ADMR features in the Pt/$\alpha$-Fe${}_2$O${}_3$ bilayers.

arXiv commentmatches the published version

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Cited by in corpus (17)

• Electrical Switching of Tristate Antiferromagnetic Néel Order in $\alpha$-Fe${}_2$O${}_3$ Epitaxial Films
• Large spin Hall magnetoresistance in antiferromagnetic α-Fe2O3/Pt heterostructures
• Spin Hall magnetoresistance in antiferromagnetic insulators
• Structural sensitivity of the spin Hall magnetoresistance in antiferromagnetic thin films
• Tunable and Enhanced Rashba Spin-Orbit Coupling in Iridate-Manganite Heterostructures
• Unidirectional Spin Hall Magnetoresistance in Antiferromagnetic Heterostructures
• Quantifying Spin-Orbit Torques in Antiferromagnet/Heavy Metal Heterostructures
• Third Harmonic Characterization of Antiferromagnetic Heterostructures
• Role of substrate clamping on anisotropy and domain structure in the canted antiferromagnet $\alpha$-Fe${}_2$O${}_3$
• Comprehensive Demonstration of Spin-Hall Hanle Effects in Epitaxial Pt Thin Films
• Magnon-mediated interlayer coupling in an all-antiferromagnetic junction
• Static magnetic proximity effects and spin Hall magnetoresistance in Pt/Y${}_3$Fe${}_5$O${}_{12}$ and inverted Y${}_3$Fe${}_5$O${}_{12}$/Pt bilayers
• Effective strain manipulation of the antiferromagnetic state of polycrystalline NiO
• Single- and Multimagnon Dynamics in Antiferromagnetic $\alpha$-Fe${}_2$O${}_3$ Thin Films
• Insight into the structural and magnetotransport properties of epitaxial heterostructures $\alpha$-Fe${}_2$O${}_3$-Pt(111): Role of the reversed layer sequence
• Anisotropic Field Suppression of Morin Transition Temperature in Epitaxially Grown Hematite Thin Films
• Ground states and magnonics in orthogonally-coupled symmetric all-antiferromagnetic junctions